Originally Posted by OzExorcist
There's an even bigger reason casinos use plastic cards - they're a bajillion times easier to shuffle and deal.
As a dealer, there's nothing that tilts me more than trying to riffle paper cards. After a couple of hands they're generally bowed too, which makes them more difficult to pitch accurately.
As far as paper cards holding the "bow". I have only seen this when people use the Roman riffle shuffle. But, if people do a table riffle shuffle like a casino, the bow is not a problem.
As I said in a previous post...if you see a single bowed card, the odds
are that someone was palming it and switched in a held-out card. So, the bow is a way to spot a potential mechanic.
NOTE: Even if the cards happen to "bow", that is VERY easy to fix. Simply take the deck and bow the cards in the opposite direction and they are straight again.